Marin Mersenne 2^P-1
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Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

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MnStatusDetails
561001603Composite: 1 known prime factor
Factored
FactorDigitsBitsDate
4844859628282514483992168.72017-08-08 12:59:57
History
DateUserTypeResult
2025-03-07James HeinrichF
Factor: 484485962828251448399 / TF: 68-70
2017-08-08Alex_soldierF
Factor: 484485962828251448399 / TF: 68-69*
2016-11-09ConductorNF
no factor from 2^67 to 2^68
2015-10-29sasakiNF
no factor from 2^66 to 2^67
2014-04-30sasakiNF
no factor from 2^65 to 2^66
2011-05-10Architects CubedNF
no factor from 2^64 to 2^65
2010-03-02Architects CubedNF
no factor from 2^63 to 2^64